Rotary pump



' A, HAYES.

APR. 1, 192;. I

Patented Nov. 1, 1921.

2 SHEETS-SHEET 1.

A. HAYES.

ROTARY PUMP.

PT 5 1917 R I APPLICATION FILED S v ENEWED APR- 1, 1921. v 1,395,91 6. Patented Nov. 1, 1921. 2 SHEE S-SHEET 2.

UNITED STATES PATENT OFFICE.

ALBERT HAYES, or NEW YORK, N. Y., ASSIGNOR 'ro CARNOT' DEVELOPMENT conno- RATION, A CORPORATION on NEW YORK.

ROTARY PUMP.

Specification of Letters Patent.

Patented Nov. 1, 1921.

Application filed September 5, 1917, Serial No. 189,723. Renewed April 1, 1921. Serial No. 457,706.

To all whom it may concern:

Be it known that I, ALBERT HAYES, 'a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to rotary pumps of the class which comprises asfeatures of construction a chamber of cylindrical or approximately cylindrical form having an inlet and an on let and a carrier mounted to rotate in the chamber on an axis eccentric to the axis of the chamber and carrying gates or pistons arranged to slide in slots in the carrier and guided in their movement as the carrier rotates, by fixed cams in the heads of the chamber.

My invention has for its object to provide a pump. of the class above described which will be simple and inexpensive to construct, will be highly efiicient in operation and will be free from liability to clogging or injury from sand or grit.

With these and other objects hereinafter explained in View, my invention consists in the construction and combination of elements hereinafter described and claimed.

Referring to the drawings:

Figure 1 is a front elevation of a rotary pump embodying my invention showing the operating parts of the pump in central vertical section.

gig. 2 is a front view of one of the heads an Fig. 3 is a cross sectional view of the operating parts on a plane midway between the heads.

In the construction shown in the drawings the chamber comprises two heads 1, 1, a body 2 connecting the two heads and a cylinder 3 carried 'by the heads and extending Within the lines of the shoulder 6 the 'heads are recessed preferably to a depth stead of'forming,'as is common in pumps of this class, a cam groove of uniform width throughout to receive the lugs of the gates or pistons and to guide them throughout their movement by contact with them at opposite-points, the cams are so formed that during a portion of the travel of a gate or piston it will be in contact with a guidin surface only on the outside ofits lug an during another part of its travel it will be in contact with a guiding surface only on the inside of the lug, the mside of the lug in the one instance an d the outside of the lug in the other instance traveling at such distance from any guiding or other surface as to leave free space for the passage of sand or other solid material.

Within the cam recessor chamber above the center of the head, and above the opening 4 for the shaft is formed a crescent 10 the upper or outer edge or wall of which is formed as shown at 12 on the arc of a circle concentric with the head this sur face 12 extending to points 12 and 12 in a plane slightly below the plane of the center of the opening 4.

sis

Also within the cam recess or chamber tially the same plane with the points 12 and 12 of the upper crescent 10. The lower or outer edge or wall of the crescent 11 may be formed on any convenient are but should be separated from the inner wall of the shoulder '7 by a substantial space.

On the shaft 5 within the cylinder 3 is arranged the carrier 18. This carrier consists of a cylinder fast on the shaft and provided with radial slots 17, here shown as six in number, adapted to permit the gates or pistons 14 to slide in them. These gates or pistons each consist of a plate of a width to fit easily between the inner faces of the shoulders 6 of the heads and having near their inner ends lugs 15 extending outward into the cam recesses in the respective heads, these lugs being preferably as shown formed as stub shafts or axles to carry rings or rollbis 16 to lessen friction. These. gates or pistons are each of such len th relative to the carrier that when it is directly above the center of the shaft its outer. edge is slightly within the inner surface of the cylinder 3.

The cylinder 3 extends around and is supported by the outer face of the shoulder 6 its ends abutting against the flanges 8. Midway between its ends this cylinder is circumferentially slotted to form an inlet opening or port 19 and an outlet opening or port 20. The inlet opening extends from a point slightly above the horizontal plane of the shaft 5 to a point nearly-in line with the vertical plane of the shaft. The outlet opening extends from a point below the horizontal plane of the shaft to a point somewhat beyond the vertical plane of the shaft.

The body 2 is provided exteriorly with suitable supports 24 connecting it with a base 25 and is provided on one side with a socket 21 to receive the inlet or suction pipe leading from the source of supply and is provided on its top with a socket 22 to receive the delivery pipe. In the construction shown the socket for the delivery pipe is of greater diameter than the socket for the suction pipe an arrangement which by reason of the effectiveness of the construction of the pump as shown is found to be desir4 able. The body 2 is so constructed that its inner surface from the socket for the delivery pipe to the socket for the suction pipe fits closely against the outer surface of the cylinder 3 and from a point somewhat below the socket for the suction pipe to the lower end of the outlet opening 20 it also fits snugly against the cylinder. From the lower end of the outlet opening 20 to the socket for the delivery pipe the body 2 is curved outward as shown at 23 to form an enlarged passage leading to the delivery The shoulder 6 is rovided above and in line with shaft 5 wit a recess 30 communicating with the cam recess or chamber and with the outlet opening or port 20 permitting free outflow of liquid carrying sand or rit.

In operation as a gate or piston passes downward past the place of the points 12 and 13 of the crescents it will be thrown outward by centrifugal force so that its outer edge will bear snugly against the interior of cylinder 3 and as the gate or piston continues its movement the centrifugal force will be aided by the Weight of the gate or piston the roller 16 resting on the surface 13 of the lower crescent. As the gate or piston moves beyond the vertical plane of the axis of the shaft it will be drawn or guided inward by the surface 13 so that as it reaches the place of the points 13 and 12 it will be 1n position to rest against surface 12 of the upper crescent, its weight tending to keep it in contact with this surface.

While the invention is herein shown and described as applied to a rotary pump and is particularly adapted to such use, I wish it to be understood that the invention is not limited to use as a pump but may be applied to a motor or engine itbeing, of course, understood that when so used the operating fluid which may be water, steam or gas, is

to be supplied under pressure to the inletand allowed to flow freely from the outlet.

Having thus described my invention, what I claim is:

1. The combination of a cylinder having inlet and outlet openings, a cylindrical carrier mounted to rotate eccentrically in said cylinder said carrier being slotted radially, sliding gates mounted in the slots of the carrier to make contact with the interior of the cylinder and having laterally extending portions, heads for the cylinder each having a recess formed therein, guides for said laterally extending portions of the gates within the recesses, the uiding surfacesof said guides being spaced apart-from the walls of the recess a distance sufliciently greater than th diametrical extent of the laterally extending portions of the gates to permit of free passage of sediment.

2. The combination of a cylinder having inlet ,and outlet openings, a cylindrical carrier mounted to rotate eccentrically in-said cylinder said carrier being slotted radially, sliding gates mounted in the slots of the carrier to make contact with the interior of the cylinder and having laterally extending portions, heads for the cylinder each having a recess formed therein, guides for said laterally extending portions of the gates With in the recesses, the guiding surfaces of said guides being spaced apart from the walls of the recess a distance sufficiently greater than the diametrical extent of the laterally extending portions of the gates to permit of free passage of sediment and an open'passage leading from the recess to the outlet open1ng.

3. The combination of a cylinder having inlet and outlet openings, a cylindrical carrier mounted to rotate eccentrically in said cylinder said carrier being slotted radially, sliding gates mounted in the slots of the carrier to make contact with the interior of the cylinder and having laterally extending portions, heads for the cylinder each having a recess formed therein to receive the laterally extending portions of the gates, guides for said laterally extending portion of. the gates arranged Within'the recess on opposite sides of the center of the recess, one of said guides having its guiding surface on its exterior at a distance from the wall of the recess sufiiciently greater than lthe diametrical extent of the laterally extending portions of the gates to permit of free passage of sediment, and the other guide having its guiding surface on its interior.

4. The combination of a cylinder having inlet and outlet openings, a cylindrical carrier mounted to rotate eccentrically in said cylinder said carrier being slotted radially, sliding gates mounted in the slots of the carrier to make contact withv the interior of the cylinder and having laterally extending portions, heads for the cylinder each having a recess formed therein to receive the laterally extending portions of the gates,

of the gates arranged within the recess on.

opposite sides of the centerof therecess and independent of the walls of the recess with their ends spaced apart sufficiently to permit of the passage of the laterally extending portions of the gates, one of said guides having its guiding surface on itsexterior and the other having its-guiding surface on its interior.

5. The combination of a cylinder having inlet and outlet openings, a cylindrical carrier mounted to rotate eccentrically in said cylinder said carrier being slotted radially, sliding gates mounted in the slots of the carrier to make contact with the interior of the cylinder and having laterally extending portions, heads for the cylinder each having a recess formed therein to receive the laterally exte ding portions of the gates, guides for said laterally extending portions of sald gates arranged within the recess on opposite sides of the center of the recess and independent of the walls offthe recess with their ends spaced apart sufiiciently to permit of the passage of the laterally extending portions of the gates, one of said guides having its guiding surface on its exterior and the other having its guiding surface on its guides being formed on arcs having a common center.

6. The combination of a cylinder having inlet and outlet openings, a cylindrical carrier mounted to rotate eccentrically in said cylinder said carrier being slotted radially, sliding gates mounted in the slots of the carrier to make contact with the interiorv of the cylinder and having laterally extending portions, heads for the cylinder each having a recess formed therein to receive the laterally extending portions of the gates, crescent shaped guides for said laterally extending portions of said gates arranged within the recess on opposite sides of the center of the recess andindependent of the wall of the recess with their ends spaced apart sufiiciently to permit of the passage of the laterally extending portions of the gates, one

tending portions of said gates arranged within the recess on opposite-sides of the center of the recess and independent of the walls of the recess with their ends spaced apart sufiiciently to permit of the passage ofthe laterally extending portions of the gates,0'n'.of said guides having its guiding surface on \its exterior and the other having its guiding surface'on its interior, the guiding surfaces of the two guides being forme on'arcs havinga common center.

In testimony whereof I aflix my signature this 12thday of May, 1917.

. I ALBERT HAYES. 

